Posted By: denfireguy
1973 and 74 Cuda tach wire - 03/25/11 03:13 PM
It seems like my firewall has self healed the hole where the tachometer wire feeds through.
Burdar (thanks,Darren) sent me a pic of where it goes through on a Challenger but my firewall does not have a hole in the same position. And I cannot find the hole where it came from. The tach wire has been disconnected for 5 years now so my feeble memory is no help.
Thanks in advance if anyone has a picture or a description of where it goes.
Craig
Posted By: denfireguy
Re: 1973 and 74 Cuda tach wire - 03/25/11 08:45 PM
Someone must know. The FSM doesn't seem to.
Posted By: Challenger 1
Re: 1973 and 74 Cuda tach wire - 03/25/11 09:22 PM
It feeds thru the fuse block, the lowest hole in the block, part of the wiper motor plug on 73-74s
Grey wire.
Posted By: fshd4it
Re: 1973 and 74 Cuda tach wire - 03/25/11 09:34 PM
Craig, my '73 challenger (w/ '74 rallye wiring) doesn't have a special hole for the grey tach wire, it goes thru the terminal block; it's the upper left wire (next to the purple one) in the connector closest to the brake booster. I know this is chall info, but I'd swear my '74 barracuda was identical.
Posted By: denfireguy
Re: 1973 and 74 Cuda tach wire - 03/26/11 02:01 AM
I think I am going to drill a new hole where yours is and be done with it.
The tach wire on my harness has the grommet attached to the wire still so it obviously went through its own hole. I probably have something else routed in its place.
My 72 FSM shows tach wire in cavity 20 (Next to the purple wire mentioned before). My 73 FSM shows that this is the A/C clutch.
A new hole will work just fine.
Craig
Posted By: burdar
Re: 1973 and 74 Cuda tach wire - 03/26/11 02:18 AM
I looked at my new harness as well. The gray wire right next to the purple wire goes to the oil pressure gauge.
Posted By: fshd4it
Re: 1973 and 74 Cuda tach wire - 03/26/11 02:42 AM
And you would be correct, the grey wire on top IS for my oil sender. The tach wire is in the opposite (bottom) corner of the same connector. My bad, I didn't trace it out carefully enough. My '73 has a dimple where yours has a hole. But my car didn't come with a rallye dash, I added it and harness,etc, from a '74 donor. Now here's the other weird part, my 1973 wiring schematic shows the wire in the connector, but my 1974 (same year as my wiring)FSM shows the wire routed off by itself.
